Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758220AbcDEMT1 (ORCPT ); Tue, 5 Apr 2016 08:19:27 -0400 Received: from www.linutronix.de ([62.245.132.108]:37869 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757938AbcDEMTZ (ORCPT ); Tue, 5 Apr 2016 08:19:25 -0400 Subject: Re: [PATCH] s390/cpum_sf: Remove superfluous SMP function call To: Heiko Carstens References: <1459765640-13599-1-git-send-email-anna-maria@linutronix.de> <20160405104912.GC3937@osiris> <57039DC2.6090907@linutronix.de> <20160405112336.GB6890@osiris> <20160405113637.GC6890@osiris> <20160405115129.GE30124@linutronix.de> <5703A836.7030708@linutronix.de> <20160405121155.GF6890@osiris> Cc: rcochran@linutronix.de, Anna-Maria Gleixner , Martin Schwidefsky , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, rt@linutronix.de From: Sebastian Andrzej Siewior Message-ID: <5703AD4B.30903@linutronix.de> Date: Tue, 5 Apr 2016 14:19:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.7.0 MIME-Version: 1.0 In-Reply-To: <20160405121155.GF6890@osiris> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 423 Lines: 15 On 04/05/2016 02:11 PM, Heiko Carstens wrote: > I think there is more broken: if I willingly let __cpu_disable() fail and > try to offline e.g. cpu 2 for the second time chcpu will never return. > Plus the console contains several "NOHZ: local_softirq_pending 01" > messages. … > > All of this works without problems on vanilla 4.5 kernel. > > I think you can reproduce this on any architecture :) oh yes. Sebastian